Parabola Study

This is a parabolic dish and trough derived from the parabolic curve defined in the conic section model http://www.thingiverse.com/thing:182820

The parabolic dish and trough are utilized in solar collector design (among other uses):
http://en.wikipedia.org/wiki/Parabolic_reflector
http://en.wikipedia.org/wiki/Parabolic_trough

This, the ellipse study http://www.thingiverse.com/thing:183683 and a coming hyperbola study are meant to function as a teaching set.